The National Weather service has issued a winter weather warning for the Santa Cruz Mountains, East Bay Hills and Diablo Range above 2,500 feet through early Saturday. Temperatures are expected to hit the low 20s inland and 30s near the coast.

Locals are being warned to continue to cover sensitive plants and keep pets inside overnight.

Poon said two to four inches could fall over peaks including Mt. Tamalpais, Mt. Diablo, Mt. Hamilton, and the upper reaches of the Santa Cruz Mountains. Even before nightfall, snow was reported on Higway 29 north of Calistoga and on the peaks of Mt. Saint Helena.